"An Industrial Level..." was very nice, although I needed 5 minutes for the riddle with the bombs at the end, nevertheless good idea. "Antarctic Jungle" has an interesting look, but is a little hard. I didn't made it to the exit, yet.

I haven't really managed to get through some of it, I can't get those blocks in time, but I don't like to rely on badguys to get through something. Also I thought some of the gaps with signs on could be stood on, resulting in a death.